Combination step, walk and run exerciser



FIG. 1 is a front-right-top perspective view of a combination step, walk and run exerciser showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a combination step, walk and run exerciser, as shown and described. 